US735530A - Apparatus for mixing concrete. - Google Patents

Description

No. 735,530; 'PATENTED AUG. 4, 1903.

P. KI THNEL APPARATUS FOR MIXING CONCRETE.

APPLIOATIQN I'ILBD 00122, 1902.

N0 MODEL.

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Patented August 4, 1903.

PATENT OFFICE.

} PAUL KUHNE, on NEW YORK, N. Y.

'APPARATUS FOR MIXING CONCRETE.

SPECIFICATION forming part of Letters IPatent No. 735,530, dated August 4, 1903.

Application filed October 22, 1902. Serial No. 128,253. (ll'o model.) I

To all whom it may concern:

Be it known that I, PAUL KiiHNE, a citizen of the United States, residing in New York,

borough of Manhattan, and State of New York, have invented certain new and useful Improvements in Apparatus for Mixing Concrete, of which the following is a specification.

pers and a water-receptacle sidewise of said hoppers, a bucket wheel supported in suitable bearings of the casing below said hoppers, mixing-grates below said bucket-wheel on which the material drops, means for supplying water to the materials during the mixing thereof, and a deflector below each grate for directing the material from one grate to the other.

The invention consists, further, of certain details of construction and combinations of parts which will be fully described hereinafter and finally pointed out in the claims. i

In the accompanying drawings, "Figure 1 represents a vertical transverse section of my improved machine for mixing concrete; and Fig. 2 is a vertical transverse section of the same on line 2 2, Fig. 1. 3

Similar letters of reference indicate corresponding parts. I

My improved machine for mixing concrete is interTdedao be operated without power by the gravity of the materials supplied into the hoppers of the machine. For this purpose the machine is intended to be supported on and between parallel beams of any suitable frame structure. The machine consists of a funnel-shaped casing A,which iswider at the upper end and tapering on two opposite sides to the lower end, said casing being rectangular in cross-section and provided at its upper end with a plurality of hoppers of different sizes for receiving various proportions of two or more materials.-such as cement, sand, gravel, broken stones, cinders, or ashes+t0 be mixed. The hopper B at one side of the casing A is intended to be .used for cement, While the larger main hopper B is provided with a removable-partition b, that is removed when sand, stone, cinders, or ashes is to be used alone, but which is put in place when two materials, as sand and stone or cinders and ashes, are to be mixed with the cement. The lower ends of the hopper communicate with a throat O, converging downwardly below the same, and the lower ends of the cementhopper B and the throat O are provided with gate-valves b b respectively, which are provided with levers c and suitable locking devices (not shown) at the outer ends of theirpivots, so as to be placed into closed or open position. For filling the hoppers the valves 12' b are placed in closed position, and obviously for operatingthe machine they are placed in open position, so that the materials discharge by gravity out of the hoppers B B through the throat O. The lever that controls the gate-valve of the hopper B for the cement is preferably provided with and adjusted by an index-finger or pointer b adapted to move over a graduated scale on the casing adjacent the lever in any approved manner, so as to regulate thereby the quantity of cement that fiows into the throat in proportion to the flow of the material or materials that pass from the hopper, and thus insure the exact quantity of cement desired for themass.

On the sides of the casing, at the ends of and above the bucket-wheel,areparranged arc shaped shields f for preventingmaterial from dropping between the ends of the bucket wheel and easing upon thebearings on the shaft. At the upper right-handcorner of the casing A, on the side opposite to the cementhopper, is arranged a receptacle B for water. This receptacle is connected by a valved pipe D at its lower end with a smaller receptacle or pocket D vertically below the upper receptacle, the inner wall of said pocket being perforated, so that the water from the same issues in the form of jets into the casing A, as shown in Fig. 1. Below the lower end of the throat Cand extending parallel therewith is arranged a bucket-wheel E, which turns on a shaft supported stationary of the side walls of the casing A, said bucket-wheel being adapted to turn under the weight of the materials dropped into the buckets of the same, so as to discharge said materials onto an inclined grate G, which is arranged below the bucket-wheel near the inner wall of the water-receptacle D. The bucket-wheel Eis retained in position on the shaft by means of suitable collars 6, so as to prevent the lateral displacement of the bucket-wheel. The buckets arranged on the circumference of the wheel are supported on suitable spider-frames E, which extend from the hubs on the shaft 6 to the inner circumference of the bucketwheel. The material to be mixed is discharged approximately in tangential direction of the bucket-wheel and is dropped into the buckets, causing the wheel to turn by gravity, so that the mixing of the dry material takes place in the buckets, and from the buckets it is discharged onto the grates G, broken up and mixed by its passage through the grates, after which it receives the supply of water by the jets passing through the perforations of the inner wall of the lower receptacle D. The quantity of water thus supplied is regulated by the faucet and is in proportion to the quantity of material to be mixed. Below the grate G is arranged an inclined chute H, along which the moistened material slides, a concave deflecting-plate F being arranged intermediately of the grate G and chute H parallel therewith and at one side, so as to form with the chute a kind of hopper from which the material is discharged to a second lower grate G, that is supported on the opposite side wall of the casing and inclined in an opposite direction to the grate G. A second inclined chute H is arranged below the grate G, so as to conduct the material that is passed through the grate G toward the oppositely-inclined lower portion of the wall of the casing and then from the opening A in the lower part of the same to the outside, ready to be taken up by the buckets of the hoisting apparatus.

In using myimproved concrete-mixing machine the hoppers at the upper end of the same are filled, respectively, with cement, cinders or stones, and sand, as the case may be, according to the mixture of which the concrete is to be composed, the gate-valve being held in closed position during the charging of the hoppers. As soon as they are filled the gate-valve of the throat is opened, while the gate-valve for the cement is held in its proper position, so as to supply the required quantity of cement. At the same time the faucet is opened, so that the proper quantity of water is supplied to the dryly-mixed materials when the same is tumbled over the first grate, the mixture being placed in the hopper of the grate by the chute H and convex deflecting plate F. A more intimate mixing of the materials takes place by being dropped on the lower grate G and chute H, so that the machine not only accomplishes the supply by gravity of the cement, filling material, and Water in determined quantities, but also the intimate intermixing of these materials during their passage by gravity through the machine, so that a well-mixed concrete without use of power and with positively-controlled quantities of cement, &c., is obtained.

By keeping the hoppers continually supplied with the respective-materials the continuous How of the materials through the machine and working of the same are obtained, the proper supply of cement and water being controlled by the attendant. In this manner a very eitective concrete-mixing machine is obtained which can be used at any desired point without requiring special power and by which the irregular supply of mixing materials by hand heretotore in use is dispensed with.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A concrete-mixing machine, consisting of a funnel-shaped casing, hoppers for the materials to be mixed arranged at the upper end of said casing, pivoted gates at the lower ends of said hoppers, a tapering channel below the lower ends of said hoppers, a centrally-pivoted bucket-wheel below said supply-channel, grates inclined in opposite directions below said bucket-wheel, and inclined chutes respectively below said grates in the lower part of the casing, substantially as set forth.

2. A concrete-mixing machine, consisting of a funnel-shaped casing, a plurality of hoppers for the materials to be mixed at the upper end of the same, a water-hopper, gatevalves at the lower ends of said hoppers, a mixing-throat at the lower ends of said hoppers, a rotating bucket-wheel below said mixing-throat, inclined grates and chutes below said bucket-wheel in the lower part of the casing, a water-receptacle provided with a perforated interior wall located between the upper grate and chute, and means for supplying water from the water-hopper to said lower receptacle, substantial] y as set forth.

3. A machine for mixing concrete, consisting of a funnel-shaped casing provided with a discharge-opening at the lower end, a plurality of hoppers at the upper end for supplying respectively cement, broken stone, sand and water, a manually-controlled gate-valve at the lower end of the cement-hopper, a gatevalve at the lower end of the stone and sand hopper, a mixing-throat below the lower ends of said hoppers, a rotating bucket-wheel below said mixing-throat, an auxiliary waterreceptacle below the water-hopper, a. valved pipe connecting said water-hopper with the auxiliary receptacle, an inclined grate and chute below the receptacle, a perforated par- IIO tition connecting the auXiliarywater-recepmy invention I have signed my name in prestacle, a deflecting-plate adjacent to said grate ence of two subscribing Witnesses. and chute, and an oppositely-inclined grate and chute in the lower part of the casing be- PAUL KUHNE 5 low the upper grate and chute, substantially Witnesses:

as set forth. PAUL GOEPEL,

In testimony that I claim the foregoing as HENRY J. SUHRBIER.

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